Fix a few typos and improve grammar of redis.conf
Fix a few typos and improve grammar of redis.conf

Make several edits to the example redis.conf configuration file for
improved flow and grammar.

Signed-off-by: David Celis <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@davidcel.is>

JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis